453720990 has 64 divisors (see below), whose sum is σ = 1163336256. Its totient is φ = 112852992.

The previous prime is 453720983. The next prime is 453721003. The reversal of 453720990 is 99027354.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53694 + ... + 61566.

It is an arithmetic number, because the mean of its divisors is an integer number (18177129).

Almost surely, 2^453720990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 453720990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (581668128).

453720990 is an abundant number, since it is smaller than the sum of its proper divisors (709615266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

453720990 is a wasteful number, since it uses less digits than its factorization.

453720990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8013.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 453720990 is about 21300.7274523665. The cubic root of 453720990 is about 768.4158074138.

The spelling of 453720990 in words is "four hundred fifty-three million, seven hundred twenty thousand, nine hundred ninety".